NotifyClean is Tools Apps for Android By defim.
download latest version of NotifyClean Apk v2.5.8 build 258 for android from GlobalAPK with direct link.
You could configure which apps are allowed to create notifications in the top left area, the notification area. If an app creates a notification it will be collected and added to the list.
You could deny *all* notifications of an app or only *specific* messages - if it's not a customized notification. So I used it to hide "waiting for connection", but not "you are connected".
With a donation you supports this app and get more options.
Your device has to be rooted to install the required X-posed framework: http://tinyurl.com/cd46qco
Donator-App & Features: https://play.google.com/store/apps/details?id=de.defim.apk.notifyclean.donator